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23 lis 2022 · Viral infections are any illness you get from a virus (a small germ that uses your cells to reproduce). Common viral illnesses include colds, the flu, COVID-19, norovirus (“stomach flu”), HPV (warts) and herpes simplex virus (cold sores).
21 cze 2023 · A viral disease is any illness or health condition caused by a virus. Read on to learn more about some of the main types of viral diseases: They aren’t always contagious. Not all...
18 gru 2023 · Viral infections are contagious illnesses caused by viruses. These infections occur when the virus infects you and attacks the cells in your body. Everyone...
COVID-19, also called coronavirus disease 2019, is an illness caused by a virus. The virus is called severe acute respiratory syndrome coronavirus 2, or more commonly, SARS-CoV-2. It started spreading at the end of 2019 and became a pandemic disease in 2020. Coronavirus Enlarge image.
17 lut 2023 · Some viruses cause sickness, like common colds, the flu, and food poisoning. Symptoms of a viral infection include fever, pain, nausea, diarrhea, cough, congestion, shortness of breath, rashes, warts, and many others. The best treatment for most everyday viruses is rest, hydration, and time.
8 lis 2023 · What are viruses? Viruses are very tiny germs. They are made of genetic material (either DNA or RNA) inside of a protein coating. There are a huge number of viruses on earth. Only a small number of them can infect humans. Those viruses can infect our cells, which may cause disease.
A virus is a small infectious organism—much smaller than a fungus or bacterium—that must invade a living cell to reproduce (replicate). The virus attaches to a cell (called the host cell), enters the cell, and releases its DNA or RNA inside the cell.
